Tool-clamp



G. F. HALL TOOLIGLAMP.

Patented Nov. 26, 1889.

(No Model.)

050mg. We? 56M,

' 0. f/" flew/Q UNITED STATES PATENT OFFICE.

GEORGE F. HALL, OF NEVARK, NET JERSEY.

TOOL-CLAM P.

SPECIFICATION forming part of Letters Patent No. 415,969, dated November 26, 1889.

Application tiled August 16, 1889. Serial No. 320,983. (No model.)

.To all whom it may concern.-

Be it known that I, GEORGE F. HALL, a citizen of the United States, residing at New ark, Essex county, New Jersey, have invented certain new and useful Improvements in Tool-Clamps, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention consists in an improved clamp for such tools as have one part adj ustable toward another, the clamp forming the means of holding such parts securely in the proper relation to one another when adjusted.

The invention is shown herein applied to a pattern-marker and to a wrench., and is capable of other applications.

In the drawings, Figure l represents a pattern-marker having two pricking-wheels adjusted about an inch apart. Fig. 2 is a central section of the same, except the lower half of the handle. Fig. 3 is a plan of the same without the handle wit-h the prcking-wheels set close together. Fig. et is a side view of the clampingsteni with one of the prickingwheels held therein, and Fig.,5 a side view of the clamping-sleeve. Fig. G is a side view of a wrench constructed with my improvement;

Fig. 7, an edge view of the saine with the sleeve in section; Fig. 8, a side view of the stein; Fig. 9, a side view of the sleeve; Fig. lO, a plan of the jaws with the attached sleeve, and Fig. ll an inside view of the movable jaw.

In Figs. l to 5 the pattern-1narker is shown provided with two pricking-wheels adjustable toward one another. The adjustable element is the spindle a, carrying one prickingwheel l) upon its outer end. The spindle passes through holes e, formed near the ends of a stein c and sleeve d, and the latter parts are slotted adjacent to the holes to receive a pricking-.wheel b. The stem fits inovably within 'the sleeve and is formed with a screwthread c', iitted to a threaded socket c2 within the end of the handle f. The lower end of the sleeve is in contact with the upper end of the handle, and the spindle holds the holes e in the stein and sleeve coincident, so that any longitudinal 'thrust upon the sleeve or stein will operate to jam the spindle against one side o'f the holes e, and thus clamp the spindle tightly. Such jamming is readily effected by turning the handle upon the thread c', and thus forcing the handle against the lower end of the sleeve d, which pushes the sleeve toward the spindle a and janis the spindle outward in the holes of the stem c. To adjust the spindle, the handle is turned to screw it a little off from the lower end of the sleeve. The spindle is thus released from the clamping-pressure, and is moved in or out, asfl desired, (being shown pushed inward in Fig. 3,) and the handle is then turned to jam the sleeve against the spindle and clamp it in the adjusted position.

In Figs. 6 to l1 the movement of the parts for clamping the adjustable element is reversed, a screw-thread being formed in the lower end of the sleeve, and a screw-plug aff iixed to the handle is employed to press the stem upward instead of the sleeve, as in the construction above described. The stem is projected beyond the end of the sleeve and provided with a jaw l, to form a wrench in conjunction with an opposed jaw m,whch is fixed upon a transverse bar n, inserted through the stem and sleeve. A Vnut 0 is shown between the jaws, and the bar a is made of `dat rectangular section, as shown in Fig. 1l, to give it the necessary stiffness, and

the holes e through the stem and sleeve are made rectangular to fit such bar, as shown in Fig. 7. The handle f is formed with a projecting screw-plug g, fitted to a thread h in the lower end of the sleeve, and the lower end of the stein c is formed to touch the plug g when the lower end of the sleeve is clear from the shoulder f at the upper end of the handle. lith this construction the bar n, carrying the wrench-jaw m, is loosened for adjustment by turning the screw-plug g outward from the sleeve, and the bar is clamped (when adjusted) within the holes e by screwfa ing the stud g against the lower end of the stem, and thus pushing the bar j forcibly against the outer ends of the holes in the sleeve. The position of the parts in clamping is shown. in Figs. 6 and '7, With the under side of the hole in the stem in contact with the bar n and the bar pressed into contact with the upper sides of the holes in the sleeve.

From the aloove description it will loe seen that the essential part of the invention oonsists in the sleeve and stein perforated adjacent to one another, With holes adapted to receive a transverse loar and carried by a handle having a screw-thread for pressing the steni or sleeve longitudinally to clamp the bar within the holes. The sleeve is actuated by the handle, Whether the latter he pressed against its lower end, as in Fig. 2, or screwed Within the saine, as in Fig. 7, and it is therefore immaterial whether the screw-thread be formed inside or outside of the handle, one construction being shown in Fig. 2 in the threaded soeket c2 and the other construetion in Fig. 7 in the stud J. The handle in hOtheaSes serves equally to carry the stein yand sleeve, and its screw-thread operates equally toaetuate the ola-mp with either construction. l

`Having thus Set forthmy invention, whatl claim isl. rlhe-eolnbination7 with the handle, of a stein and-sleeve Carried by the saine, the holes e through the stem and sleeve, adjacent to one another, a cross-har fitted in such holes and carrying an adjustable portion of the tool, and the handle having a screw-thread adapted, when the handle is turned in relation to the cross-bar, to move the stem and sleeve in relation to one another, and thus clamp the cross-har, substantially as herein set forth.

2. The eoinbination, with the handle, of a stem and sleeve carried by the same, the holes e through the stein and sleeve, adjacent to one another, a wrench-jaw formed upon the outer end of the stein, the cross-bar n, movable in the holes and provided at its outer end With the jaw m, and the handle provided with a screw-thread to aetuate the sleeve, as and for the purpose set forth.

'In .testimony whereof l have hereunto set my hand in the presence of twosubseribing witnesses.

GEORGE F. HALL.

WV itnesses:

THos. S. CRANE, FRED. yC. FISCHER. 

